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List: linux-mmc
Subject: Re: + mmc-add-support-mmcif-for-superh.patch added to -mm tree
From: Yusuke Goda <yusuke.goda.sx () renesas ! com>
Date: 2010-04-30 1:38:07
Message-ID: 4BDA347F.7010305 () renesas ! com
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Hi Andrew
Thank you.
I will investigate it whether "wait_event_interruptible_timeout" is right.
Thanks,
Goda
akpm@linux-foundation.org wrote:
> The patch titled
> mmc: add support MMCIF for SuperH
> has been added to the -mm tree. Its filename is
> mmc-add-support-mmcif-for-superh.patch
>
> Before you just go and hit "reply", please:
> a) Consider who else should be cc'ed
> b) Prefer to cc a suitable mailing list as well
> c) Ideally: find the original patch on the mailing list and do a
> reply-to-all to that, adding suitable additional cc's
>
> *** Remember to use Documentation/SubmitChecklist when testing your code ***
>
> See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
> out what to do about this
>
> The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
>
> ------------------------------------------------------
> Subject: mmc: add support MMCIF for SuperH
> From: Yusuke Goda <yusuke.goda.sx@renesas.com>
>
> MMCIF is the MMC Host Interface in SuperH.
>
> Signed-off-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
> Cc: Ben Hutchings <ben@decadent.org.uk>
> Cc: Paul Mundt <lethal@linux-sh.org>
> Cc: <linux-mmc@vger.kernel.org>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> ---
>
> drivers/mmc/host/Kconfig | 8
> drivers/mmc/host/Makefile | 1
> drivers/mmc/host/sh_mmcif.c | 965 +++++++++++++++++++++++++++++++++
> include/linux/mmc/sh_mmcif.h | 39 +
> 4 files changed, 1013 insertions(+)
>
> diff -puN drivers/mmc/host/Kconfig~mmc-add-support-mmcif-for-superh drivers/mmc/host/Kconfig
> --- a/drivers/mmc/host/Kconfig~mmc-add-support-mmcif-for-superh
> +++ a/drivers/mmc/host/Kconfig
> @@ -412,3 +412,11 @@ config SDH_BFIN_MISSING_CMD_PULLUP_WORKA
> depends on SDH_BFIN
> help
> If you say yes here SD-Cards may work on the EZkit.
> +
> +config MMC_SH_MMCIF
> + tristate "SuperH Internal MMCIF support"
> + depends on MMC_BLOCK && (SUPERH || ARCH_SHMOBILE)
> + help
> + This selects the MMC Host Interface controler (MMCIF).
> +
> + This driver supports MMCIF in sh7724/sh7757/sh7372.
> diff -puN drivers/mmc/host/Makefile~mmc-add-support-mmcif-for-superh drivers/mmc/host/Makefile
> --- a/drivers/mmc/host/Makefile~mmc-add-support-mmcif-for-superh
> +++ a/drivers/mmc/host/Makefile
> @@ -34,6 +34,7 @@ obj-$(CONFIG_MMC_TMIO) += tmio_mmc.o
> obj-$(CONFIG_MMC_CB710) += cb710-mmc.o
> obj-$(CONFIG_MMC_VIA_SDMMC) += via-sdmmc.o
> obj-$(CONFIG_SDH_BFIN) += bfin_sdh.o
> +obj-$(CONFIG_MMC_SH_MMCIF) += sh_mmcif.o
>
> obj-$(CONFIG_MMC_SDHCI_OF) += sdhci-of.o
> sdhci-of-y := sdhci-of-core.o
> diff -puN /dev/null drivers/mmc/host/sh_mmcif.c
> --- /dev/null
> +++ a/drivers/mmc/host/sh_mmcif.c
> @@ -0,0 +1,965 @@
> +/*
> + * MMCIF eMMC driver.
> + *
> + * Copyright (C) 2010 Renesas Solutions Corp.
> + * Yusuke Goda <yusuke.goda.sx@renesas.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License.
> + *
> + *
> + * TODO
> + * 1. DMA
> + * 2. Power management
> + * 3. Handle MMC errors better
> + *
> + */
> +
> +#include <linux/dma-mapping.h>
> +#include <linux/mmc/host.h>
> +#include <linux/mmc/card.h>
> +#include <linux/mmc/core.h>
> +#include <linux/mmc/mmc.h>
> +#include <linux/mmc/sdio.h>
> +#include <linux/delay.h>
> +#include <linux/platform_device.h>
> +#include <linux/clk.h>
> +#include <linux/mmc/sh_mmcif.h>
> +
> +#define DRIVER_NAME "sh_mmcif"
> +#define DRIVER_VERSION "2010-04-28"
> +
> +#define MMCIF_CE_CMD_SET 0x00000000
> +#define MMCIF_CE_ARG 0x00000008
> +#define MMCIF_CE_ARG_CMD12 0x0000000C
> +#define MMCIF_CE_CMD_CTRL 0x00000010
> +#define MMCIF_CE_BLOCK_SET 0x00000014
> +#define MMCIF_CE_CLK_CTRL 0x00000018
> +#define MMCIF_CE_BUF_ACC 0x0000001C
> +#define MMCIF_CE_RESP3 0x00000020
> +#define MMCIF_CE_RESP2 0x00000024
> +#define MMCIF_CE_RESP1 0x00000028
> +#define MMCIF_CE_RESP0 0x0000002C
> +#define MMCIF_CE_RESP_CMD12 0x00000030
> +#define MMCIF_CE_DATA 0x00000034
> +#define MMCIF_CE_INT 0x00000040
> +#define MMCIF_CE_INT_MASK 0x00000044
> +#define MMCIF_CE_HOST_STS1 0x00000048
> +#define MMCIF_CE_HOST_STS2 0x0000004C
> +#define MMCIF_CE_VERSION 0x0000007C
> +
> +/* CE_CMD_SET */
> +#define CMD_MASK 0x3f000000
> +#define CMD_SET_RTYP_NO ((0 << 23) | (0 << 22))
> +#define CMD_SET_RTYP_6B ((0 << 23) | (1 << 22)) /* R1/R1b/R3/R4/R5 */
> +#define CMD_SET_RTYP_17B ((1 << 23) | (0 << 22)) /* R2 */
> +#define CMD_SET_RBSY (1 << 21) /* R1b */
> +#define CMD_SET_CCSEN (1 << 20)
> +#define CMD_SET_WDAT (1 << 19) /* 1: on data, 0: no data */
> +#define CMD_SET_DWEN (1 << 18) /* 1: write, 0: read */
> +#define CMD_SET_CMLTE (1 << 17) /* 1: multi block trans, 0: single */
> +#define CMD_SET_CMD12EN (1 << 16) /* 1: CMD12 auto issue */
> +#define CMD_SET_RIDXC_INDEX ((0 << 15) | (0 << 14)) /* index check */
> +#define CMD_SET_RIDXC_BITS ((0 << 15) | (1 << 14)) /* check bits check */
> +#define CMD_SET_RIDXC_NO ((1 << 15) | (0 << 14)) /* no check */
> +#define CMD_SET_CRC7C ((0 << 13) | (0 << 12)) /* CRC7 check*/
> +#define CMD_SET_CRC7C_BITS ((0 << 13) | (1 << 12)) /* check bits check*/
> +#define CMD_SET_CRC7C_INTERNAL ((1 << 13) | (0 << 12)) /* internal CRC7 check*/
> +#define CMD_SET_CRC16C (1 << 10) /* 0: CRC16 check*/
> +#define CMD_SET_CRCSTE (1 << 8) /* 1: not receive CRC status */
> +#define CMD_SET_TBIT (1 << 7) /* 1: tran mission bit "Low" */
> +#define CMD_SET_OPDM (1 << 6) /* 1: open/drain */
> +#define CMD_SET_CCSH (1 << 5)
> +#define CMD_SET_DATW_1 ((0 << 1) | (0 << 0)) /* 1bit */
> +#define CMD_SET_DATW_4 ((0 << 1) | (1 << 0)) /* 4bit */
> +#define CMD_SET_DATW_8 ((1 << 1) | (0 << 0)) /* 8bit */
> +
> +/* CE_CMD_CTRL */
> +#define CMD_CTRL_BREAK (1 << 0)
> +
> +/* CE_BLOCK_SET */
> +#define BLOCK_SIZE_MASK 0x0000ffff
> +
> +/* CE_CLK_CTRL */
> +#define CLK_ENABLE (1 << 24) /* 1: output mmc clock */
> +#define CLK_CLEAR ((1 << 19) | (1 << 18) | (1 << 17) | (1 << 16))
> +#define CLK_SUP_PCLK ((1 << 19) | (1 << 18) | (1 << 17) | (1 << 16))
> +#define SRSPTO_256 ((1 << 13) | (0 << 12)) /* resp timeout */
> +#define SRBSYTO_29 ((1 << 11) | (1 << 10) | \
> + (1 << 9) | (1 << 8)) /* resp busy timeout */
> +#define SRWDTO_29 ((1 << 7) | (1 << 6) | \
> + (1 << 5) | (1 << 4)) /* read/write timeout */
> +#define SCCSTO_29 ((1 << 3) | (1 << 2) | \
> + (1 << 1) | (1 << 0)) /* ccs timeout */
> +
> +/* CE_BUF_ACC */
> +#define BUF_ACC_DMAWEN (1 << 25)
> +#define BUF_ACC_DMAREN (1 << 24)
> +#define BUF_ACC_BUSW_32 (0 << 17)
> +#define BUF_ACC_BUSW_16 (1 << 17)
> +#define BUF_ACC_ATYP (1 << 16)
> +
> +/* CE_INT */
> +#define INT_CCSDE (1 << 29)
> +#define INT_CMD12DRE (1 << 26)
> +#define INT_CMD12RBE (1 << 25)
> +#define INT_CMD12CRE (1 << 24)
> +#define INT_DTRANE (1 << 23)
> +#define INT_BUFRE (1 << 22)
> +#define INT_BUFWEN (1 << 21)
> +#define INT_BUFREN (1 << 20)
> +#define INT_CCSRCV (1 << 19)
> +#define INT_RBSYE (1 << 17)
> +#define INT_CRSPE (1 << 16)
> +#define INT_CMDVIO (1 << 15)
> +#define INT_BUFVIO (1 << 14)
> +#define INT_WDATERR (1 << 11)
> +#define INT_RDATERR (1 << 10)
> +#define INT_RIDXERR (1 << 9)
> +#define INT_RSPERR (1 << 8)
> +#define INT_CCSTO (1 << 5)
> +#define INT_CRCSTO (1 << 4)
> +#define INT_WDATTO (1 << 3)
> +#define INT_RDATTO (1 << 2)
> +#define INT_RBSYTO (1 << 1)
> +#define INT_RSPTO (1 << 0)
> +#define INT_ERR_STS (INT_CMDVIO | INT_BUFVIO | INT_WDATERR | \
> + INT_RDATERR | INT_RIDXERR | INT_RSPERR | \
> + INT_CCSTO | INT_CRCSTO | INT_WDATTO | \
> + INT_RDATTO | INT_RBSYTO | INT_RSPTO)
> +
> +/* CE_INT_MASK */
> +#define MASK_ALL 0x00000000
> +#define MASK_MCCSDE (1 << 29)
> +#define MASK_MCMD12DRE (1 << 26)
> +#define MASK_MCMD12RBE (1 << 25)
> +#define MASK_MCMD12CRE (1 << 24)
> +#define MASK_MDTRANE (1 << 23)
> +#define MASK_MBUFRE (1 << 22)
> +#define MASK_MBUFWEN (1 << 21)
> +#define MASK_MBUFREN (1 << 20)
> +#define MASK_MCCSRCV (1 << 19)
> +#define MASK_MRBSYE (1 << 17)
> +#define MASK_MCRSPE (1 << 16)
> +#define MASK_MCMDVIO (1 << 15)
> +#define MASK_MBUFVIO (1 << 14)
> +#define MASK_MWDATERR (1 << 11)
> +#define MASK_MRDATERR (1 << 10)
> +#define MASK_MRIDXERR (1 << 9)
> +#define MASK_MRSPERR (1 << 8)
> +#define MASK_MCCSTO (1 << 5)
> +#define MASK_MCRCSTO (1 << 4)
> +#define MASK_MWDATTO (1 << 3)
> +#define MASK_MRDATTO (1 << 2)
> +#define MASK_MRBSYTO (1 << 1)
> +#define MASK_MRSPTO (1 << 0)
> +
> +/* CE_HOST_STS1 */
> +#define STS1_CMDSEQ (1 << 31)
> +
> +/* CE_HOST_STS2 */
> +#define STS2_CRCSTE (1 << 31)
> +#define STS2_CRC16E (1 << 30)
> +#define STS2_AC12CRCE (1 << 29)
> +#define STS2_RSPCRC7E (1 << 28)
> +#define STS2_CRCSTEBE (1 << 27)
> +#define STS2_RDATEBE (1 << 26)
> +#define STS2_AC12REBE (1 << 25)
> +#define STS2_RSPEBE (1 << 24)
> +#define STS2_AC12IDXE (1 << 23)
> +#define STS2_RSPIDXE (1 << 22)
> +#define STS2_CCSTO (1 << 15)
> +#define STS2_RDATTO (1 << 14)
> +#define STS2_DATBSYTO (1 << 13)
> +#define STS2_CRCSTTO (1 << 12)
> +#define STS2_AC12BSYTO (1 << 11)
> +#define STS2_RSPBSYTO (1 << 10)
> +#define STS2_AC12RSPTO (1 << 9)
> +#define STS2_RSPTO (1 << 8)
> +#define STS2_CRC_ERR (STS2_CRCSTE | STS2_CRC16E | \
> + STS2_AC12CRCE | STS2_RSPCRC7E | STS2_CRCSTEBE)
> +#define STS2_TIMEOUT_ERR (STS2_CCSTO | STS2_RDATTO | \
> + STS2_DATBSYTO | STS2_CRCSTTO | \
> + STS2_AC12BSYTO | STS2_RSPBSYTO | \
> + STS2_AC12RSPTO | STS2_RSPTO)
> +
> +/* CE_VERSION */
> +#define SOFT_RST_ON (1 << 31)
> +#define SOFT_RST_OFF (0 << 31)
> +
> +#define CLKDEV_EMMC_DATA 52000000 /* 52MHz */
> +#define CLKDEV_MMC_DATA 20000000 /* 20MHz */
> +#define CLKDEV_INIT 400000 /* 400 KHz */
> +
> +struct sh_mmcif_host {
> + struct mmc_host *mmc;
> + struct mmc_data *data;
> + struct mmc_command *cmd;
> + struct platform_device *pd;
> + struct clk *hclk;
> + unsigned int clk;
> + int bus_width;
> + u16 wait_int;
> + u16 sd_error;
> + long timeout;
> + void __iomem *addr;
> + wait_queue_head_t intr_wait;
> +};
> +
> +static inline u32 sh_mmcif_readl(struct sh_mmcif_host *host, unsigned int reg)
> +{
> + return readl(host->addr + reg);
> +}
> +
> +static inline void sh_mmcif_writel(struct sh_mmcif_host *host,
> + unsigned int reg, u32 val)
> +{
> + writel(val, host->addr + reg);
> +}
> +
> +static inline void sh_mmcif_bitset(struct sh_mmcif_host *host,
> + unsigned int reg, u32 val)
> +{
> + writel(val | sh_mmcif_readl(host, reg), host->addr + reg);
> +}
> +
> +static inline void sh_mmcif_bitclr(struct sh_mmcif_host *host,
> + unsigned int reg, u32 val)
> +{
> + writel(~val & sh_mmcif_readl(host, reg), host->addr + reg);
> +}
> +
> +
> +static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk)
> +{
> + struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
> +
> + sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE);
> + sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR);
> +
> + if (!clk)
> + return;
> + if (p->sup_pclk && clk == host->clk)
> + sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_SUP_PCLK);
> + else
> + sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR &
> + (ilog2(__rounddown_pow_of_two(host->clk / clk)) << 16));
> +
> + sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE);
> +}
> +
> +static void sh_mmcif_sync_reset(struct sh_mmcif_host *host)
> +{
> + u32 tmp;
> +
> + tmp = 0x010f0000 & sh_mmcif_readl(host, MMCIF_CE_CLK_CTRL);
> +
> + sh_mmcif_writel(host, MMCIF_CE_VERSION, SOFT_RST_ON);
> + sh_mmcif_writel(host, MMCIF_CE_VERSION, SOFT_RST_OFF);
> + sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, tmp |
> + SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29);
> + /* byte swap on */
> + sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP);
> +}
> +
> +static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
> +{
> + u32 state1, state2;
> + int ret, timeout = 10000000;
> +
> + host->sd_error = 0;
> + host->wait_int = 0;
> +
> + state1 = sh_mmcif_readl(host, MMCIF_CE_HOST_STS1);
> + state2 = sh_mmcif_readl(host, MMCIF_CE_HOST_STS2);
> + pr_debug("%s: ERR HOST_STS1 = %08x\n", \
> + DRIVER_NAME, sh_mmcif_readl(host, MMCIF_CE_HOST_STS1));
> + pr_debug("%s: ERR HOST_STS2 = %08x\n", \
> + DRIVER_NAME, sh_mmcif_readl(host, MMCIF_CE_HOST_STS2));
> +
> + if (state1 & STS1_CMDSEQ) {
> + sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, CMD_CTRL_BREAK);
> + sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, ~CMD_CTRL_BREAK);
> + while (1) {
> + timeout--;
> + if (timeout < 0) {
> + pr_err(DRIVER_NAME": Forceed end of " \
> + "command sequence timeout err\n");
> + return -EIO;
> + }
> + if (!(sh_mmcif_readl(host, MMCIF_CE_HOST_STS1)
> + & STS1_CMDSEQ))
> + break;
> + mdelay(1);
> + }
> + sh_mmcif_sync_reset(host);
> + pr_debug(DRIVER_NAME": Forced end of command sequence\n");
> + return -EIO;
> + }
> +
> + if (state2 & STS2_CRC_ERR) {
> + pr_debug(DRIVER_NAME": Happened CRC error\n");
> + ret = -EIO;
> + } else if (state2 & STS2_TIMEOUT_ERR) {
> + pr_debug(DRIVER_NAME": Happened Timeout error\n");
> + ret = -ETIMEDOUT;
> + } else {
> + pr_debug(DRIVER_NAME": Happened End/Index error\n");
> + ret = -EIO;
> + }
> + return ret;
> +}
> +
> +static int sh_mmcif_single_read(struct sh_mmcif_host *host,
> + struct mmc_request *mrq)
> +{
> + struct mmc_data *data = mrq->data;
> + long time;
> + u32 blocksize, i, *p = sg_virt(data->sg);
> +
> + host->wait_int = 0;
> +
> + /* buf read enable */
> + sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
> + time = wait_event_interruptible_timeout(host->intr_wait,
> + host->wait_int == 1 ||
> + host->sd_error == 1, host->timeout);
> + if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
> + return sh_mmcif_error_manage(host);
> +
> + host->wait_int = 0;
> + blocksize = (BLOCK_SIZE_MASK &
> + sh_mmcif_readl(host, MMCIF_CE_BLOCK_SET)) + 3;
> + for (i = 0; i < blocksize / 4; i++)
> + *p++ = sh_mmcif_readl(host, MMCIF_CE_DATA);
> +
> + /* buffer read end */
> + sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
> + time = wait_event_interruptible_timeout(host->intr_wait,
> + host->wait_int == 1 ||
> + host->sd_error == 1, host->timeout);
> + if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
> + return sh_mmcif_error_manage(host);
> +
> + host->wait_int = 0;
> + return 0;
> +}
> +
> +static int sh_mmcif_multi_read(struct sh_mmcif_host *host,
> + struct mmc_request *mrq)
> +{
> + struct mmc_data *data = mrq->data;
> + long time;
> + u32 blocksize, i, j, sec, *p;
> +
> + blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host, MMCIF_CE_BLOCK_SET);
> + for (j = 0; j < data->sg_len; j++) {
> + p = sg_virt(data->sg);
> + host->wait_int = 0;
> + for (sec = 0; sec < data->sg->length / blocksize; sec++) {
> + sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
> + /* buf read enable */
> + time = wait_event_interruptible_timeout(host->intr_wait,
> + host->wait_int == 1 ||
> + host->sd_error == 1, host->timeout);
> +
> + if (host->wait_int != 1 &&
> + (time == 0 || host->sd_error != 0))
> + return sh_mmcif_error_manage(host);
> +
> + host->wait_int = 0;
> + for (i = 0; i < blocksize / 4; i++)
> + *p++ = sh_mmcif_readl(host, MMCIF_CE_DATA);
> + }
> + if (j < data->sg_len - 1)
> + data->sg++;
> + }
> + return 0;
> +}
> +
> +static int sh_mmcif_single_write(struct sh_mmcif_host *host,
> + struct mmc_request *mrq)
> +{
> + struct mmc_data *data = mrq->data;
> + long time;
> + u32 blocksize, i, *p = sg_virt(data->sg);
> +
> + host->wait_int = 0;
> + sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
> +
> + /* buf write enable */
> + time = wait_event_interruptible_timeout(host->intr_wait,
> + host->wait_int == 1 ||
> + host->sd_error == 1, host->timeout);
> + if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
> + return sh_mmcif_error_manage(host);
> +
> + host->wait_int = 0;
> + blocksize = (BLOCK_SIZE_MASK &
> + sh_mmcif_readl(host, MMCIF_CE_BLOCK_SET)) + 3;
> + for (i = 0; i < blocksize / 4; i++)
> + sh_mmcif_writel(host, MMCIF_CE_DATA, *p++);
> +
> + /* buffer write end */
> + sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
> +
> + time = wait_event_interruptible_timeout(host->intr_wait,
> + host->wait_int == 1 ||
> + host->sd_error == 1, host->timeout);
> + if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
> + return sh_mmcif_error_manage(host);
> +
> + host->wait_int = 0;
> + return 0;
> +}
> +
> +static int sh_mmcif_multi_write(struct sh_mmcif_host *host,
> + struct mmc_request *mrq)
> +{
> + struct mmc_data *data = mrq->data;
> + long time;
> + u32 i, sec, j, blocksize, *p;
> +
> + blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host, MMCIF_CE_BLOCK_SET);
> +
> + for (j = 0; j < data->sg_len; j++) {
> + p = sg_virt(data->sg);
> + host->wait_int = 0;
> + for (sec = 0; sec < data->sg->length / blocksize; sec++) {
> + sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
> + /* buf write enable*/
> + time = wait_event_interruptible_timeout(host->intr_wait,
> + host->wait_int == 1 ||
> + host->sd_error == 1, host->timeout);
> +
> + if (host->wait_int != 1 &&
> + (time == 0 || host->sd_error != 0))
> + return sh_mmcif_error_manage(host);
> +
> + host->wait_int = 0;
> + for (i = 0; i < blocksize / 4; i++)
> + sh_mmcif_writel(host, MMCIF_CE_DATA, *p++);
> + }
> + if (j < data->sg_len - 1)
> + data->sg++;
> + }
> + return 0;
> +}
> +
> +static void sh_mmcif_get_response(struct sh_mmcif_host *host,
> + struct mmc_command *cmd)
> +{
> + if (cmd->flags & MMC_RSP_136) {
> + cmd->resp[0] = sh_mmcif_readl(host, MMCIF_CE_RESP3);
> + cmd->resp[1] = sh_mmcif_readl(host, MMCIF_CE_RESP2);
> + cmd->resp[2] = sh_mmcif_readl(host, MMCIF_CE_RESP1);
> + cmd->resp[3] = sh_mmcif_readl(host, MMCIF_CE_RESP0);
> + } else
> + cmd->resp[0] = sh_mmcif_readl(host, MMCIF_CE_RESP0);
> +}
> +
> +static void sh_mmcif_get_cmd12response(struct sh_mmcif_host *host,
> + struct mmc_command *cmd)
> +{
> + cmd->resp[0] = sh_mmcif_readl(host, MMCIF_CE_RESP_CMD12);
> +}
> +
> +static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
> + struct mmc_request *mrq, struct mmc_command *cmd, u32 opc)
> +{
> + u32 tmp = 0;
> +
> + /* Response Type check */
> + switch (mmc_resp_type(cmd)) {
> + case MMC_RSP_NONE:
> + tmp |= CMD_SET_RTYP_NO;
> + break;
> + case MMC_RSP_R1:
> + case MMC_RSP_R1B:
> + case MMC_RSP_R3:
> + tmp |= CMD_SET_RTYP_6B;
> + break;
> + case MMC_RSP_R2:
> + tmp |= CMD_SET_RTYP_17B;
> + break;
> + default:
> + pr_err(DRIVER_NAME": Not support type response.\n");
> + break;
> + }
> + switch (opc) {
> + /* RBSY */
> + case MMC_SWITCH:
> + case MMC_STOP_TRANSMISSION:
> + case MMC_SET_WRITE_PROT:
> + case MMC_CLR_WRITE_PROT:
> + case MMC_ERASE:
> + case MMC_GEN_CMD:
> + tmp |= CMD_SET_RBSY;
> + break;
> + }
> + /* WDAT / DATW */
> + if (host->data) {
> + tmp |= CMD_SET_WDAT;
> + switch (host->bus_width) {
> + case MMC_BUS_WIDTH_1:
> + tmp |= CMD_SET_DATW_1;
> + break;
> + case MMC_BUS_WIDTH_4:
> + tmp |= CMD_SET_DATW_4;
> + break;
> + case MMC_BUS_WIDTH_8:
> + tmp |= CMD_SET_DATW_8;
> + break;
> + default:
> + pr_err(DRIVER_NAME": Not support bus width.\n");
> + break;
> + }
> + }
> + /* DWEN */
> + if (opc == MMC_WRITE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK)
> + tmp |= CMD_SET_DWEN;
> + /* CMLTE/CMD12EN */
> + if (opc == MMC_READ_MULTIPLE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK) {
> + tmp |= CMD_SET_CMLTE | CMD_SET_CMD12EN;
> + sh_mmcif_bitset(host, MMCIF_CE_BLOCK_SET,
> + mrq->data->blocks << 16);
> + }
> + /* RIDXC[1:0] check bits */
> + if (opc == MMC_SEND_OP_COND || opc == MMC_ALL_SEND_CID ||
> + opc == MMC_SEND_CSD || opc == MMC_SEND_CID)
> + tmp |= CMD_SET_RIDXC_BITS;
> + /* RCRC7C[1:0] check bits */
> + if (opc == MMC_SEND_OP_COND)
> + tmp |= CMD_SET_CRC7C_BITS;
> + /* RCRC7C[1:0] internal CRC7 */
> + if (opc == MMC_ALL_SEND_CID ||
> + opc == MMC_SEND_CSD || opc == MMC_SEND_CID)
> + tmp |= CMD_SET_CRC7C_INTERNAL;
> +
> + return opc = ((opc << 24) | tmp);
> +}
> +
> +static u32 sh_mmcif_data_trans(struct sh_mmcif_host *host,
> + struct mmc_request *mrq, u32 opc)
> +{
> + u32 ret;
> +
> + switch (opc) {
> + case MMC_READ_MULTIPLE_BLOCK:
> + ret = sh_mmcif_multi_read(host, mrq);
> + break;
> + case MMC_WRITE_MULTIPLE_BLOCK:
> + ret = sh_mmcif_multi_write(host, mrq);
> + break;
> + case MMC_WRITE_BLOCK:
> + ret = sh_mmcif_single_write(host, mrq);
> + break;
> + case MMC_READ_SINGLE_BLOCK:
> + case MMC_SEND_EXT_CSD:
> + ret = sh_mmcif_single_read(host, mrq);
> + break;
> + default:
> + pr_err(DRIVER_NAME": NOT SUPPORT CMD = d'%08d\n", opc);
> + ret = -EINVAL;
> + break;
> + }
> + return ret;
> +}
> +
> +static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
> + struct mmc_request *mrq, struct mmc_command *cmd)
> +{
> + long time;
> + int ret = 0, mask = 0;
> + u32 opc = cmd->opcode;
> +
> + host->cmd = cmd;
> +
> + switch (opc) {
> + /* respons busy check */
> + case MMC_SWITCH:
> + case MMC_STOP_TRANSMISSION:
> + case MMC_SET_WRITE_PROT:
> + case MMC_CLR_WRITE_PROT:
> + case MMC_ERASE:
> + case MMC_GEN_CMD:
> + mask = MASK_MRBSYE;
> + break;
> + default:
> + mask = MASK_MCRSPE;
> + break;
> + }
> + mask |= MASK_MCMDVIO | MASK_MBUFVIO | MASK_MWDATERR |
> + MASK_MRDATERR | MASK_MRIDXERR | MASK_MRSPERR |
> + MASK_MCCSTO | MASK_MCRCSTO | MASK_MWDATTO |
> + MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO;
> +
> + if (host->data) {
> + sh_mmcif_writel(host, MMCIF_CE_BLOCK_SET, 0);
> + sh_mmcif_writel(host, MMCIF_CE_BLOCK_SET, mrq->data->blksz);
> + }
> + opc = sh_mmcif_set_cmd(host, mrq, cmd, opc);
> +
> + sh_mmcif_writel(host, MMCIF_CE_INT, 0xD80430C0);
> + sh_mmcif_writel(host, MMCIF_CE_INT_MASK, mask);
> + /* set arg */
> + sh_mmcif_writel(host, MMCIF_CE_ARG, cmd->arg);
> + host->wait_int = 0;
> + /* set cmd */
> + sh_mmcif_writel(host, MMCIF_CE_CMD_SET, opc);
> +
> + time = wait_event_interruptible_timeout(host->intr_wait,
> + host->wait_int == 1 || host->sd_error == 1, host->timeout);
> + if (host->wait_int != 1 && time == 0) {
> + cmd->error = sh_mmcif_error_manage(host);
> + return;
> + }
> + if (host->sd_error) {
> + switch (cmd->opcode) {
> + case MMC_ALL_SEND_CID:
> + case MMC_SELECT_CARD:
> + case MMC_APP_CMD:
> + cmd->error = -ETIMEDOUT;
> + break;
> + default:
> + pr_debug("%s: Cmd(d'%d) err\n",
> + DRIVER_NAME, cmd->opcode);
> + cmd->error = sh_mmcif_error_manage(host);
> + break;
> + }
> + host->sd_error = 0;
> + host->wait_int = 0;
> + return;
> + }
> + if (!(cmd->flags & MMC_RSP_PRESENT)) {
> + cmd->error = ret;
> + host->wait_int = 0;
> + return;
> + }
> + if (host->wait_int == 1) {
> + sh_mmcif_get_response(host, cmd);
> + host->wait_int = 0;
> + }
> + if (host->data) {
> + ret = sh_mmcif_data_trans(host, mrq, cmd->opcode);
> + if (ret < 0)
> + mrq->data->bytes_xfered = 0;
> + else
> + mrq->data->bytes_xfered =
> + mrq->data->blocks * mrq->data->blksz;
> + }
> + cmd->error = ret;
> +}
> +
> +static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host,
> + struct mmc_request *mrq, struct mmc_command *cmd)
> +{
> + long time;
> +
> + if (mrq->cmd->opcode == MMC_READ_MULTIPLE_BLOCK)
> + sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE);
> + else if (mrq->cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK)
> + sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE);
> + else {
> + pr_err(DRIVER_NAME": not support stop cmd\n");
> + cmd->error = sh_mmcif_error_manage(host);
> + return;
> + }
> +
> + time = wait_event_interruptible_timeout(host->intr_wait,
> + host->wait_int == 1 ||
> + host->sd_error == 1, host->timeout);
> + if (host->wait_int != 1 && (time == 0 || host->sd_error != 0)) {
> + cmd->error = sh_mmcif_error_manage(host);
> + return;
> + }
> + sh_mmcif_get_cmd12response(host, cmd);
> + host->wait_int = 0;
> + cmd->error = 0;
> +}
> +
> +static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
> +{
> + struct sh_mmcif_host *host = mmc_priv(mmc);
> +
> + switch (mrq->cmd->opcode) {
> + /* MMCIF does not support SD/SDIO command */
> + case SD_IO_SEND_OP_COND:
> + case MMC_APP_CMD:
> + mrq->cmd->error = -ETIMEDOUT;
> + mmc_request_done(mmc, mrq);
> + return;
> + case MMC_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */
> + if (!mrq->data) {
> + /* send_if_cond cmd (not support) */
> + mrq->cmd->error = -ETIMEDOUT;
> + mmc_request_done(mmc, mrq);
> + return;
> + }
> + break;
> + default:
> + break;
> + }
> + host->data = mrq->data;
> + sh_mmcif_start_cmd(host, mrq, mrq->cmd);
> + host->data = NULL;
> +
> + if (mrq->cmd->error != 0) {
> + mmc_request_done(mmc, mrq);
> + return;
> + }
> + if (mrq->stop)
> + sh_mmcif_stop_cmd(host, mrq, mrq->stop);
> + mmc_request_done(mmc, mrq);
> +}
> +
> +static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
> +{
> + struct sh_mmcif_host *host = mmc_priv(mmc);
> + struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
> +
> + if (ios->power_mode == MMC_POWER_OFF) {
> + /* clock stop */
> + sh_mmcif_clock_control(host, 0);
> + if (p->down_pwr)
> + p->down_pwr(host->pd);
> + return;
> + } else if (ios->power_mode == MMC_POWER_UP) {
> + if (p->set_pwr)
> + p->set_pwr(host->pd, ios->power_mode);
> + }
> +
> + if (ios->clock)
> + sh_mmcif_clock_control(host, ios->clock);
> +
> + host->bus_width = ios->bus_width;
> +}
> +
> +static struct mmc_host_ops sh_mmcif_ops = {
> + .request = sh_mmcif_request,
> + .set_ios = sh_mmcif_set_ios,
> +};
> +
> +static void sh_mmcif_detect(struct mmc_host *mmc)
> +{
> + mmc_detect_change(mmc, 0);
> +}
> +
> +static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
> +{
> + struct sh_mmcif_host *host = dev_id;
> + u32 state = 0;
> + int err = 0;
> +
> + state = sh_mmcif_readl(host, MMCIF_CE_INT);
> +
> + if (state & INT_RBSYE) {
> + sh_mmcif_writel(host, MMCIF_CE_INT, ~(INT_RBSYE | INT_CRSPE));
> + sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MRBSYE);
> + } else if (state & INT_CRSPE) {
> + sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_CRSPE);
> + sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCRSPE);
> + } else if (state & INT_BUFREN) {
> + sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_BUFREN);
> + sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
> + } else if (state & INT_BUFWEN) {
> + sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_BUFWEN);
> + sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
> + } else if (state & INT_CMD12DRE) {
> + sh_mmcif_writel(host, MMCIF_CE_INT,
> + ~(INT_CMD12DRE | INT_CMD12RBE |
> + INT_CMD12CRE | INT_BUFRE));
> + sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE);
> + } else if (state & INT_BUFRE) {
> + sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_BUFRE);
> + sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
> + } else if (state & INT_DTRANE) {
> + sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_DTRANE);
> + sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
> + } else if (state & INT_CMD12RBE) {
> + sh_mmcif_writel(host, MMCIF_CE_INT,
> + ~(INT_CMD12RBE | INT_CMD12CRE));
> + sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE);
> + } else if (state & INT_ERR_STS) {
> + /* err interrupts */
> + sh_mmcif_writel(host, MMCIF_CE_INT, ~state);
> + sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
> + err = 1;
> + } else {
> + pr_debug("%s: Not support int\n", DRIVER_NAME);
> + sh_mmcif_writel(host, MMCIF_CE_INT, ~state);
> + sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
> + err = 1;
> + }
> + if (err) {
> + host->sd_error = 1;
> + pr_debug("%s: int err state = %08x\n", DRIVER_NAME, state);
> + }
> + host->wait_int = 1;
> + wake_up(&host->intr_wait);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int __devinit sh_mmcif_probe(struct platform_device *pdev)
> +{
> + int ret = 0, irq[2];
> + struct mmc_host *mmc;
> + struct sh_mmcif_host *host = NULL;
> + struct sh_mmcif_plat_data *pd = NULL;
> + struct resource *res;
> + void __iomem *reg;
> + char clk_name[8];
> +
> + irq[0] = platform_get_irq(pdev, 0);
> + irq[1] = platform_get_irq(pdev, 1);
> + if (irq[0] < 0 || irq[1] < 0) {
> + pr_err(DRIVER_NAME": Get irq error\n");
> + return -ENXIO;
> + }
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res) {
> + dev_err(&pdev->dev, "platform_get_resource error.\n");
> + return -ENXIO;
> + }
> + reg = ioremap(res->start, resource_size(res));
> + if (!reg) {
> + dev_err(&pdev->dev, "ioremap error.\n");
> + return -ENOMEM;
> + }
> + pd = (struct sh_mmcif_plat_data *)(pdev->dev.platform_data);
> + if (!pd) {
> + dev_err(&pdev->dev, "sh_mmcif plat data error.\n");
> + ret = -ENXIO;
> + goto clean_up;
> + }
> + mmc = mmc_alloc_host(sizeof(struct sh_mmcif_host), &pdev->dev);
> + if (!mmc) {
> + ret = -ENOMEM;
> + goto clean_up;
> + }
> + host = mmc_priv(mmc);
> + host->mmc = mmc;
> + host->addr = reg;
> + host->timeout = 1000;
> +
> + snprintf(clk_name, sizeof(clk_name), "mmc%d", pdev->id);
> + host->hclk = clk_get(&pdev->dev, clk_name);
> + if (IS_ERR(host->hclk)) {
> + dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
> + ret = PTR_ERR(host->hclk);
> + goto clean_up1;
> + }
> + clk_enable(host->hclk);
> + host->clk = clk_get_rate(host->hclk);
> + host->pd = pdev;
> +
> + init_waitqueue_head(&host->intr_wait);
> +
> + mmc->ops = &sh_mmcif_ops;
> + mmc->f_max = host->clk;
> + /* close to 400KHz */
> + if (mmc->f_max < 51200000)
> + mmc->f_min = mmc->f_max / 128;
> + else if (mmc->f_max < 102400000)
> + mmc->f_min = mmc->f_max / 256;
> + else
> + mmc->f_min = mmc->f_max / 512;
> + if (pd->ocr)
> + mmc->ocr_avail = pd->ocr;
> + mmc->caps = MMC_CAP_MMC_HIGHSPEED;
> + if (pd->caps)
> + mmc->caps |= pd->caps;
> + mmc->max_phys_segs = 128;
> + mmc->max_hw_segs = 128;
> + mmc->max_blk_size = 512;
> + mmc->max_blk_count = 65535;
> + mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
> + mmc->max_seg_size = mmc->max_req_size;
> +
> + sh_mmcif_sync_reset(host);
> + platform_set_drvdata(pdev, host);
> + mmc_add_host(mmc);
> +
> + ret = request_irq(irq[0], sh_mmcif_intr, 0, "sh_mmc:error", host);
> + if (ret) {
> + pr_err(DRIVER_NAME": request_irq error (sh_mmc:error)\n");
> + goto clean_up2;
> + }
> + ret = request_irq(irq[1], sh_mmcif_intr, 0, "sh_mmc:int", host);
> + if (ret) {
> + free_irq(irq[0], host);
> + pr_err(DRIVER_NAME": request_irq error (sh_mmc:int)\n");
> + goto clean_up2;
> + }
> +
> + sh_mmcif_writel(host, MMCIF_CE_INT_MASK, MASK_ALL);
> + sh_mmcif_detect(host->mmc);
> +
> + pr_info("%s: driver version %s\n", DRIVER_NAME, DRIVER_VERSION);
> + pr_debug("%s: chip ver H'%04x\n", DRIVER_NAME,
> + sh_mmcif_readl(host, MMCIF_CE_VERSION) & 0x0000ffff);
> + return ret;
> +
> +clean_up2:
> + clk_disable(host->hclk);
> +clean_up1:
> + mmc_free_host(mmc);
> +clean_up:
> + if (reg)
> + iounmap(reg);
> + return ret;
> +}
> +
> +static int __devexit sh_mmcif_remove(struct platform_device *pdev)
> +{
> + struct sh_mmcif_host *host = platform_get_drvdata(pdev);
> + int irq[2];
> +
> + sh_mmcif_writel(host, MMCIF_CE_INT_MASK, MASK_ALL);
> +
> + irq[0] = platform_get_irq(pdev, 0);
> + irq[1] = platform_get_irq(pdev, 1);
> +
> + if (host->addr)
> + iounmap(host->addr);
> +
> + platform_set_drvdata(pdev, NULL);
> + mmc_remove_host(host->mmc);
> +
> + free_irq(irq[0], host);
> + free_irq(irq[1], host);
> +
> + clk_disable(host->hclk);
> + mmc_free_host(host->mmc);
> +
> + return 0;
> +}
> +
> +static struct platform_driver sh_mmcif_driver = {
> + .probe = sh_mmcif_probe,
> + .remove = sh_mmcif_remove,
> + .driver = {
> + .name = DRIVER_NAME,
> + },
> +};
> +
> +static int __init sh_mmcif_init(void)
> +{
> + return platform_driver_register(&sh_mmcif_driver);
> +}
> +
> +static void __exit sh_mmcif_exit(void)
> +{
> + platform_driver_unregister(&sh_mmcif_driver);
> +}
> +
> +module_init(sh_mmcif_init);
> +module_exit(sh_mmcif_exit);
> +
> +
> +MODULE_DESCRIPTION("SuperH on-chip MMC/eMMC interface driver");
> +MODULE_LICENSE("GPL");
> +MODULE_ALIAS(DRIVER_NAME);
> +MODULE_AUTHOR("Yusuke Goda <yusuke.goda.sx@renesas.com>");
> diff -puN /dev/null include/linux/mmc/sh_mmcif.h
> --- /dev/null
> +++ a/include/linux/mmc/sh_mmcif.h
> @@ -0,0 +1,39 @@
> +/*
> + * include/linux/mmc/sh_mmcif.h
> + *
> + * platform data for eMMC driver
> + *
> + * Copyright (C) 2010 Renesas Solutions Corp.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License.
> + *
> + */
> +
> +#ifndef __SH_MMCIF_H__
> +#define __SH_MMCIF_H__
> +
> +/*
> + * MMCIF : CE_CLK_CTRL [19:16]
> + * 1000 : Peripheral clock / 512
> + * 0111 : Peripheral clock / 256
> + * 0110 : Peripheral clock / 128
> + * 0101 : Peripheral clock / 64
> + * 0100 : Peripheral clock / 32
> + * 0011 : Peripheral clock / 16
> + * 0010 : Peripheral clock / 8
> + * 0001 : Peripheral clock / 4
> + * 0000 : Peripheral clock / 2
> + * 1111 : Peripheral clock (sup_pclk set '1')
> + */
> +
> +struct sh_mmcif_plat_data {
> + void (*set_pwr)(struct platform_device *pdev, int state);
> + void (*down_pwr)(struct platform_device *pdev);
> + u8 sup_pclk; /* 1 :SH7757, 0: SH7724/SH7372 */
> + unsigned long caps;
> + u32 ocr;
> +};
> +
> +#endif /* __SH_MMCIF_H__ */
> _
>
> Patches currently in -mm which might be from yusuke.goda.sx@renesas.com are
>
> mmc-add-support-mmcif-for-superh.patch
>
--
EC No. W
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